Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ceee2631c7982afb5c4895f455a8987bbb0f6e01a0a2f92ab1c9e62d5c2ce08d' 
  AND token = 'CIszEPVRk6BRzmgQsiwUbIz3vPfOe1/iR/26We2209E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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