Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '083d8e66bf8ce800ebb3f6bcf89770b9ea8a52292f2b605152c18e8919285154' 
  AND token = '0r/C8nUhyJLBhhOzkxM5hPmPSugXfVEmPeV0Ev6/6ps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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