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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '025d50ddb199e85f6d770dafe9bea85e69a322a55b3976b57bb1a05eb0f1bad1' 
  AND token = 'JAEMXdD5mi53Yhhi1I0JI3Z45zjh24+Us3nj2MLeNI8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}