Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf31ceb5e5d2cf16008996bace8193a4e73986e1d90591f0bfdf85074207c2f1' 
  AND token = 'Cb72sG8H6d5EN9iWNkyCsV8h0yU9rCrCmMOzcdnPgvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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