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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c101486985a04b2a9f9741d5f12f053f38f971775f6ad8953597b59a32107813' 
  AND token = 'HsuwrjUx2K9XRVOgquf15AU5w9+ROyGTap1tE5q/L6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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