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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '887dc750c34191f50305267711a8e63000202205d26e1fdb16e2ec56624826bd' 
  AND token = 'koMuek20RSxXuuO2/Jww9NZYCTbLkwCdqx9INvq5RJk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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