SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'fb54d6889047af4d80b06e27ca2b8c392d7d59779dc5f69d55ebcb02ca33c8c8' 
  AND token = 'nfBpdfLJ6FEeoZJlwU8/X1h5kvtXtB4InLQ+1HX07Ds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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