Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'be837ae2b1f08063f894c41dad63ddfbcb6ba29ab072249ed02ff4036ac1b1c9' 
  AND token = 'cQsTrk1aOprBLGNxlAw8F+l9V0bWWojPD37aOMB8n/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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