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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04073203a7fe39cfbf949b737f93cc7b64cc9905301f7acf545adcc2ee9a9f85' 
  AND token = '67BWwRZ2MxtHBPdT32stosXe5Kk0tGEnZcGIB/wayzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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