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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e73921621d2d3466699e583da0e379873a29b13c3ba112931bfa0880f6985eca' 
  AND token = 'GyVcZf61iO6d7AT1k81nvNNX8D1U99rh0nU4xAGFWzg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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