Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccb0a975a4b05f7ea5ff47ab07cdcbf7acf76415c654795f1c6dcda3c4b8f3e0' 
  AND token = '31Paqdtbcgsuai9HG2a/eFQKacBxMo7vNng9z3SF4as=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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