Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37a47d9ff43c8ea7427c41b27f89725b1b1ed7b0d5db660c5b2b1d2857a5d378' 
  AND token = 'Z0cea1BMbcxL86Wu6WBN8dTLwEay2Rk4utlDBwP72Ds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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