Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8e53ed731d37e43ea2e45927cf7527f9b32e8d1908b6c9d982bc0923e504f91a' 
  AND token = 'gTRnmuCyOxO1Ma34P2Uq+VFBpvjdl5nkxPlS1HEWipQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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