Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '639d6a8d065e55f0ebb78f531a4935daa640a37407d43bea9d4942c92140e3f5' 
  AND token = 'dl9u0ziemovn1SgNzCw8yDCUoGI5u22zE/Rhhy26S9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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