Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2a1dfead3ef5afccd2a0169c5fcbd4eb22d924d00e3cdf73fcf318318854797' 
  AND token = 'QLBJPK1AyKGnDsPz5Kcvzocz4kmeE160cVN8eBzDIZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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