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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daa63fbbcecc3e77fc4617f9fd86374daa3aa3299c8737b956c892f4b32164e7' 
  AND token = 'uIo3BQ0sKQYISlrH2/yLB0YvUSIspMjUt1r30kvpTIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}