SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '307875b2c92b56a29c72655903ce8d5857c0bea4af911334fe6c39ae4a4b62d3' 
  AND token = 'LdFqikjz1b4hiZLOAP/+nlIZFlv7qJsIItAnpTcgTEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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