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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bc077a649a6cb484560244279be7d6b45ba6899e58d7670d66c204847d3a2db7' 
  AND token = 'ntfWrsQHXf68fhnRKbWxUZL7cTvzSm9xs1ZG28xFLSo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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