SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '259553e51bd0b05b82f8219de1f20ba2474524e55daecf24ffb9dc962ab1b9e5' 
  AND token = 'dCdumQTo6rjwE/3mJOQ5BU8+DYI764/g1tNGwqOVPSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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