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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'bab4a05d7aa88d61f88e36ed0ef26af2b401038c3e2728eed1aabc742a40987a' 
  AND token = '6zpwW8DEegxOf7bxACKW8/Jor4l3mxUYlP7b0D4tOo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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