SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c89d8622f8bc22564ab61ebef7d1dd4c8c9555aa41963b1a60c2a3f7bf45201d' 
  AND token = 'JK7zDfuXZxFeduSbuA/h2cj0F54nnWKm2Gc4rM+xLoQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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