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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'bd828a1e975397100caa22c92128e745081de40894a277a19604cd8466878989' 
  AND token = 'NmZKeZAnxQFem++WP8edS9t7+9nCK1nBr0benT35D7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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