SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac52acbdc99b0085a8fbb38f8569a977ef025d7d6f665e90d73d14185145c4b2' 
  AND token = 'Bun6IBVPNsKpn5Zs1mJ7AP4tF/TLSIvJ7aXBWn1qZ+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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