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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01ec057691ca7eeb326e8363d68bc13057599897886eac49d781971369967a19' 
  AND token = '9JetH2OPFPG/krDUnSXcoljhQSqPLWWNC12YiG9weto=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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