SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '626f20c92b30d92868935bc1d9e74c033483e8e8ac48b9c38c0953f47bfe5ae8' 
  AND token = 'GlMDFzULAcJlZq6jFrCix2ddKEh66tVYg7+U1xy2RN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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