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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '059cc0227b5b162ddb97f0627acd1ee5e1ad0c8844c9d20d6050493ff48d93dd' 
  AND token = 'FJsBChrKgKHTgGoH1X8fsSy1C2nikJ/m50pO8O1b7oc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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