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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c64ab2f45255b155a56ca75f91e0432ea94bca433a0a0a6f013ea30ca7e8e1be' 
  AND token = 'dW1DaOuIuBKNltpYGIkRr1LKBd+8VlmuxsCywXomQFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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