Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63cbf05ba8fccd31f6d068a2119034e79ca71319b7bc0f4701b7a3ab0a05649f' 
  AND token = 'I3Fp30dWyrEobL/3dbfvHuj7hTUpvPgOWg9RPuZ1gac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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