SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b80c9ef57990d84cabdf59139b32b729e7fb17fb920804894a7d519a4227bb1' 
  AND token = 'USqJG/oKKr3b68nMLGsVJbTt3hay4Qc3Lz0mi61VBpw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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