Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb1f103702d94f51e828ad446442b8c7ba392cf3fa103a2d496642899ff62907' 
  AND token = 'Q9hkUFfpCR6sapM7uBACe4NioauYZHppS/rwbRuyjMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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