Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e4c11ee78290500319ed27f9193e6f8e19feeaf4afa5c57ec1c1886077f368ff' 
  AND token = '1QzQMRkHJ45pk1DjmeyV9AL3a5jK8m5WI6tW98NGdmo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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