Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1e891fc26adaa3394d260f1bd75960442d38de057ad1e00d54455b5843638c23' 
  AND token = 'Jm7jMPHCCGfIBy/G4smJ76iU0AULUcrEIQHh67fQhTY=' 
  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"
    }
  }
}