Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '19e4134814f16054478fc734750a96ba74b09b29cd3703289a08ad338ed77c11' 
  AND token = '94rcEjZ51/b17My7xITdzgQwJA2Bx2ED/1aZvmoWNp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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