Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8e7c811edca0a2eb093de22210c817c51e0fdb555aa706814791be3ff83234c' 
  AND token = 'ze61QgCp+uOeK6a8s2+fhQrMX6owqTPlC02g5V0wHsU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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