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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '00b7b1ed338033eeb99372960159b51d210d2484f5b4c3ac47ce9ca63150dce2' 
  AND token = 'lApgyYltwEUdCBEulP/Vdp6GlL4g/OiEAzsGpR3Q4n4=' 
  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"
    }
  }
}