SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7d4c5379c6fcc6b4961c9495cf4ad545a4d1e54bb3d7428155d3176f81350d29' 
  AND token = 'ZEsKITY+BUCa/16FWg9LXPF/pV5oOPEqoByvrFXtDw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}