Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c99bc929025b6c3c6989283f25522b21ba6c24ca67267d2059405cc40f88bfa' 
  AND token = '75st8hgQJRZ6b/PIs6mpdmovJbb/YHEdGrvAZAY9r4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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