Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b6ce8099514e85fc3fd69c79facd145c4dd15e23402aac28cc7ba13ce2a630bf' 
  AND token = 'lPyqWsnIHuuUA1gBU7x15+12McE6auTsxrkZVe5Kmg8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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