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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '43abf5e41ff61f0b4ed45887d839cb6d7fe521f1cb63455148df63023854044a' 
  AND token = '+aWbPXauThf1PhcBz+/H7ynyrOeUn+BPwEgBlXI+7Dc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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