Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a75e6e6e8cce4a576d78e5083ccdd84c8fdb0f8077e14cb2749597f41c98bd1' 
  AND token = 'oYQN2yZkBN7vPTI2D9bFOqL8ktP+obZI3TomZt5S3AM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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