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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3cd9b0ae24aac3f924227707a7bf7a19079d992f8b0ab3ec93b5216dd544d84' 
  AND token = 'YSTUZzxZmwvm/x4uuz3YU96vZn6/wqOslsyx4daw08w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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