Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fe5d58ac9abeb010c2a3730cb09c92655d9371eb2cd215b56d26bc31f021d635' 
  AND token = 'HDBU9edxM2dWd076mcYWvCqCOx6LS9gZGOJWFduYZ4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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