Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0dc0a09d8e51e9880a709612aa42be14921ca90350953138394ea206abac5795' 
  AND token = 'VElPkkmyHBpk+laQohJZ6Nrx8sXzQYloqiUady1vxL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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