Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6c8fa6ccb7e4b60526a8cd81d3c031c4860d3fca9dcecedb0d37d68054551c73' 
  AND token = 'AiGsBCi3OceFm02VpHIGhnHFKAnUGC0lV/KnAHaFd54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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