Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c8df727ebd02d398f947eb47fee44f35016a9f82c2e56a297dfcb5f945f20a7' 
  AND token = 't5xBRD+5uYvm8WhLsJG7bICefCDLykhPW9LRC4EDt9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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