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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acde122f59ae28c260609cf75bf5692a24c14c4067cdf0a09898cae4e17880fb' 
  AND token = 'dShZlL+frKQ9hHzmja2fe0FpRXUfFsqxQyS5cWJ/apc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00067

JSON explain

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