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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e44d2f7e05ae28f995d4bfe1712ed2d0b353b0f90887e7aedb26f75d3884ffcc' 
  AND token = 'ufyq8gXl5IvcRBuErWsSluL9Qp3dMl74Gqy0RrKCDOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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