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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1364784534a3d25c16c881674be0cc42e9a18a2865efcc270a2c0640f4e16fe' 
  AND token = 'gM92sZhaIk+p0622wlX6xewMtRO/emsl8ntEhedWZfk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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