SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '145c907703677564e2062288e4d60bc19830af4d54a16350754fbde3e8b5c27b' 
  AND token = 'IPjkbjfJnITzbFY7faBGkP2VyFLl9qGENx0u+xUEqos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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