SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '778db877eb3147862be900439154148a50e266ceff4f2e8eb9ca7124c7b7cdae' 
  AND token = 'BnyFZABS5kjRHLwAxQ9NOCnKPHoLcvPv/KPHGp634pE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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