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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee024aad35ba6947847c31d9be4732e051ca8e9e4277cf2c3e7ecc7f377ac238' 
  AND token = 'hpZD5epv1xGfPEwqqMBb9ZnGI0s5YP3V4XuibrNwQDI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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