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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd579194fd7db15fa2b51b20f2599acce44f5072b7640600498c698f11b919e97' 
  AND token = 'TwbjN+C1ZvWc3wfRk8iDz75PKgoldA7m9f1vxMdhdtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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