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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8feeafa0fab3fbbf178d8ec81a36b226fd09f4dd6ebe2dcbe21500ed16b11883' 
  AND token = 'mw+kec0UOti2e2zwT13r88TQRbtlTDV9l5b8hkhA6lw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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