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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d1dd42e7038e0e47efb3a7ca5ad0bfa2b95435893048f76e3a3de25dfe4e950' 
  AND token = 'NtUR0DoHXGKdeXOsI68SZvf5KM7CobDYXP4KQhE8Crs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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