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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '005efaf5371735c3e0a77dbecd4fc5ed6daee82d9b570d42c114276fd95fc5db' 
  AND token = 'F8i+m2f+bI47r8wkN8VBusyvulbqfNKPTsuhvPZsMWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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