Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d1d218e1094bc6e11ef251b9ce4fe7784d9196e2ef223792f5ef545be089ed2' 
  AND token = 'RoDM8f1Kf5ob25MOIv08C/it6jedDRi8f+E7BoufgxY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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