SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ff8fd422889d6c3e6ac0222ed284ee33cdc5ff1bc97cbc449ae9d239c1b58cf8' 
  AND token = '7Ogu3yKaUVialuJrCZ3/nJ/Qga2M3HhlLlRYyShj4wQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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