SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9679b32e775de99affa45fc3f04315bb1747815e96bac9e611cb9ea380851545' 
  AND token = 'wAmCzGgceP2tdvStlPv/qyzs/LaANlSn+dkEvtxZqrI=' 
  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"
    }
  }
}