Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e992bf14d2e7bc2d97a348c821d9de43dcf33453ba09974fa0aedaeffac0040b' 
  AND token = 'RTz4cQbCE/SsKqzj7DMu4AWHEzBMRkizAjQCKP+vW5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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