SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '7907aadd89c632efdf11f0d09cd439063221cf662c91c4becf5ce70f437d7055' 
  AND token = 'iNUQeXsKkIlYusZWsMFDWvBF43bcuzIGOVto+VWpn2Q=' 
  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"
    }
  }
}