Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40dbe0000a6703910b432760bbfe3bc8b98992abfd1d0e2891b4bacb0e4aaeed' 
  AND token = 'zj6AqI8l+TNNj3b7+pq0CfSroxdErfKo5dFHvSc5nEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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