Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00307a7e7ace0a1432fe16bf3aaf23b0638ed70692ecd2908404ba04ab56cd9f' 
  AND token = 'VxLEZBMcIWQJNCS4IT1r4w5Sfas43M0uXOpGTajAq2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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