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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '08c61e9b600931986f9a309deec52ea9793a662c6042bf3123ecfa1d3b301acd' 
  AND token = 'sMcvinGmkGsCxBfvs3OSKh7KlTP7xAVP+6lcnT9WFaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}